fratchy

A distinctly British informal adjective for someone who's irritable, tetchy, and ready to argue at the drop of a hat. A fratchy person wakes up on the wrong side of the bed and seems to stay there all day — they snap, they bicker, they find fault with everything. It's a perfectly descriptive word that somehow sounds exactly like the mood it describes. Often used affectionately or with exasperation when talking about a grumpy partner, tired child, or a colleague who hasn't had their coffee yet.

(UK, informal) Irritable or argumentative.